摘要
针对非对称光学系统视场范围和出瞳直径较窄、光学结构复杂、制造成本昂贵、装配调整麻烦等问题,本文采用在系统中加入自由曲面反射镜的设计方法。首先,论述了双反射镜非对称光学系统的设计要求和工作原理。然后,分析了三反射镜非对称光学系统的离轴结构控制方法。最后,采用XY多项式自由曲面反射镜折叠光路、消除遮拦、扩大视场、校正离轴像差,设计出一款适用于头盔显示器的非对称光学系统。设计的双反射镜非对称光学系统的视场为60°×30°,出瞳直径为8 mm。在截止频率52 lp/mm处,全视场的调制传递函数值大于0.25,系统畸变小于5%,单目系统重量约为190 g。设计结果表明,该非对称光学系统的视场大小和成像质量均有所提升,实现了小型轻量化,可应用于头盔显示器。
In non-symmetric optical systems,the field of view is narrow,the diameter of their exit pupil is narrow,their optical structure is complicated,their cost of manufacturing is high,and assembly adjustment is troublesome.To address these problems,free-form mirror is applied in the system.The design requirements and working principle of the dual mirror non-symmetrical optical system are firstly discussed.Then,the offaxis structure control method of the three-mirror non-symmetric optical system is analyzed.Finally,the XY polynomial free-form mirror is used to fold the optical path,eliminating the obstruction,enlarging the field of view,correcting the off-axis aberration,and a non-symmetrical optical system is designed suitable for Helmet-Mounted Display(HMD).The designed dual mirror non-symmetrical optical system has a field of view of 60°×30°and a pupil diameter of 8 mm.At a cutoff frequency of 52 lp/mm,the full field of view Modulation Transfer Function(MTF)value is greater than 0.25 and system distortion is less than 5%.This monocular system’s weight is about 190 g.The design results show that the non-symmetrical optical system has an improved field of view and image quality,it is compact and lightweight,and can be applied to a HMD.
作者
黄颂超
冯云鹏
程灏波
HUANG Song-chao;FENG Yun-peng;CHENG Hao-bo(School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Shenzhen Research Institute,Beijing Institute of Technology,Shenzhen 518057,China)
出处
《中国光学》
EI
CAS
CSCD
北大核心
2020年第4期832-841,共10页
Chinese Optics
基金
深圳市科技创新项目(No.JCYJ20170817115037194,No.JCYJ20180307123816647)。
关键词
光学设计
非对称
头盔显示器
轻量化设计
自由曲面
optical design
non-symmetrical
helmet-mounted display
lightweight design
free-form surface
作者简介
黄颂超(1994-),男,福建泉州人,硕士,助理工程师,主要从事成像光学设计方面的研究。E-mail:478886527@qq.com;通讯作者:冯云鹏(1981-),男,河北邯郸人,博士,讲师,2011年于北京理工大学获得博士学位,主要从事新型光学系统先进光学制造与检测方面的研究。E-mail:roc@bit.edu.cn。
